Leather-skiving machine.



B. MEDALIE. LEATHER SKIVING MACHINE. APPLICATION FILED MAR.14, 1911.

Patented NOV. 28, 1911.

2 SHEETSSHBET 1 rLI.

B. MEDALIB. LEATHER SKIVING MACHINE. APPLICATION FILED MAILM, 1911.

1,910,065,- 4 P atented Nov. 28, 1911.

sas a BENJAMIN MEDALIE, OF ST. LOUTS, MISSOURI, ASSIGNOR TO AMERICANSHOE MACHINERY AND TOOL COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATIONOF MISSOURI.

LEATHER -SKIVING MACHINE.

Patented Nov. 28, 1911.

Application filed March 14, 1911. Serial No. 614,499.

To all whom it may concern:

Be it known that I, BENJAMIN MEDALIE, a citizen of the United States,and a resident of the city of St. Louis and State of Missouri, haveinvented a new and useful Improvement in Leather-Skiving Machines, ofwhich the following is a specification.

This invention relates to skivingmachines and it has for its principalobjects to produce a simple and efficient machine for split ting andskiving or beveling strips or pieces of leather and similar fibrousmaterials, to provide for initially adjusting the cutting knife for acertain thickness of.v material and the automatic compensation of theknife for variations in the thickness of material passed through themachine, and to attain certain advantages hereinafter more fully appear-1ng.

Theinvention consists in the parts and in the arrangements andcombinations of parts hereinafter described and claimed.

In the accompanying drawings which form part of this specification andwherein like symbols refer to like 'parts wherever they occ1ii-,*Figure1 is a rear elevation of a skiving machine embodying my invention; Fig.2 is a side elevation; Fig. 3 is a top plan view with the feedroller-removed; Fig. 1 is a view illustrating the details of the knifeholder and its adjusting elements detached; Figs. 5 and 6 arefragmentary views illustrating the action of the feed rollers and changein the angularity of the cutting knife for different thicknesses of material; and Figs. 7 and 8 are fragmentary in any desirable manner.

views illustrating the action of the adjusting eccentric for the knifeholder.

The machine may be mounted on any suitable stand and comprise a frame ofany suitable construction. As illustrated in the drawings, the framecomprises a horizontal member 1 which may be bolted or otherwise securedon a work-bench; and at its opposite ends it is provided with roundednotched portions 2 which may be fitted over parallel horizontal bars ofa skeleton supporting frame (not shown) and clamped in position Theframe further comprises an upright member 3 on whose upper end isattached, integrally-or otherwise, a horizontal member 4 which is boredto provide a bearing for a shaft 5.

The upright member 3 is braced by inclined members or stays 6 which aresecured to. or integral with the horizontal member 1.

On one end of the shaft 5 is fixed a feed roller 7 whose peripheral faceis corrugated or serrated, as at 8. On the opposite end of the shaft 5may be fixed a crank 9, or any other suitable device or gearing forrotating the shaft.

J ournaled in a yoke 10 beneath the feed roller 7 is a cooperatingroller or idler 11 whose peripheral portion may be smooth, as' shown, orcorrugated or serrated, as desirable. The yoke 10 is mounted on a shank12 which slides in a vertical bore in the end portion 13 of a bracket 14which projects laterally from the upright member 3 of the frame. Toprevent the shank 12 from turning in the bore of the bracket, it isprovided with a groove 15 into which a pin or spline 16 on the portion13 projects.

Interposed between the top of the bracket portion 13 andbottom of theyoke 10 is a spring 17 adapted to press the Work or strip of materialbetween the rollers 5 and 11. The lower end portion of the shank 12 isreduced,.as at 18, and screw-threaded to receive jam nuts 19. Byadjusting the nuts on the screw-thread portion 18, the normal distancebetween the pair of cooperating feedrollers 5 and 11 may be varied fordifferent thicknesses of work.

Mounted on the rear of the shaft-bearing portion 4 of the frame is avertically adjustable member 20 which is provided with a slot 21 andsecured 'by a pair of binding screws 22. Pivoted to a screw stud23 secured to the lower end'portion of this member 20 is a knife-holder ortable 24:. The knife-holder is pivoted at its opposite side to a link 25whose lower end is perforated, as at 26 (see Flg. 4.), to receive aneccentric.

27 which is provided .with a bore 28 to receive a supporting stud 29secured to the yoke 10. The eccentric may be provided with a knurledportion 30, or be arranged otherwise to receive a wrench formanipulating it.

The portion of the eccentric 27 which 'fits the perforation 26 in thelink 25 is of a length slightly greater than the thickness of the link25 so that, when the screw-stud 29 is tightened, the eccentric 27 visalso tightened against the yoke, while the link 25 is free to pivot onsaid eccentric. The cutting blade or knife 31 is mounted in a recessedupper portion 32 of the holder 24 and it is held in place byv twolocking screws 33. The rear edge portion of the knife blade 31 bearsagainst an adjusting screw or stop 34. By adjusting the screw 34:, thecutting edge of the knife may be adjusted with respect to the feedrollers 5 and 11.

In front of the feed rollers is a supporting bracket or work-guide 35.This workguide preferably comprises a horizontal shelf portion and aright angular upstanding side from which projects a guard 36 adapted tokeep the fingers of the operator from moving into contact with the feedrollers. mounted on a shank 37 which is slidably fitted in a horizontalbore in a supporting bracket 38 at the front of the member 4: and issecured by a set-screw 39. By this arrangement, the work-shelf 35 may beadjusted with respect to the feed rollers so as to guide strips ofleather to be beveled or skived at different widths.

In beveling or skiving the edge portion of a strip of leather, thecutting knife is adjusted-at an angle (see Figs. 1, 2 and 5). Theadjustment is effected by moving the knife-holder supporting member 20up and down, and also by turning the eccentric 27' on which thesupporting link' 25 for the knife-holder is pivoted. Also, the nuts 19are adjusted on the shank 12 to space the idler 11 from the feed, roller5 the proper distance for a given thickness of work, allowing for acertain amountof pressure upon the work between the rollers by thespring 17. A strip of leather is placed on the supporting shelf or guide35 and moved into contact with the feed rollers and the upper roller 5which grips the work is rotated in the direction of the arrow,.byturning the crank 9, whereupon the strip is carried between the rollersand against the cutting edge of the knife-blade 31. The knife being setat an angle, the leather is split on a bevel as indicated by thediagonal line shown in Fig. 5. Should a thicker piece of leather be fedbetween the rollers, the yoke carrying the roller 11 will yield againstthe pressure of the spring 17, and the knifeholder being pivoted to thesupporting member 20 and link 25 which is ivoted on the yoke, the knifewill be tilte to a greater angle (see Fig. 6). Thus, it will be seenthat the knife may be adjusted in the first instance to any desirableangle; and it antomatically accommodates itself to any variation inthethickness ofthe leather passed allel with the axes of the feedrollers for ing the edge portion.

This work-guide or bracket. 35 is.

the purpose of splitting a strip of leather straight across, instead ofbeveling or skiv- Obviously, the device. admits of consider ablemodification without departing from my invention. Therefore, I do notwish to be limited to the specific construction and rear of saidfeed'roller and idler in the plane a of their meeting peripheralportions and pivoted on one side to a fixed support and pivoted at itsopposite sideto the resilient support for said idler, whereby theposition of the knife is automatically varied to compensate for variousthicknesses I of work which is passed between said feed roller and saididler.

2. A skiving machine comprising a horizontally journaled fixed feedroller, an idler resiliently supported 'in cooperative rela-'.

tion to said feed roller, a cutting knife approximately in theplane ofthe meeting peripheral portions of said feed roller and idler, a holderfor said knife pivoted at one side to an adjustable normally stationarysupport which is movable in a direction transversely with respect to theaxes of said, 3

feed roller and idler, said holder being pivoted at its opposite side toan adjustable member on the resilient sup ort for said idler, wherebythe knife may be adjusted at different angles initially for a certainthickness of work and whereby, also, said knife automaticallyaccommodates itself for different thicknesses of work whichis passed ingfeed roller beneath said first mentioned roller, said second me'ntionedroller being journaled on-a vertically movable springpressed support, aknife arranged with its" cutting edge in cooperative relation to saidfeed rollers so-as to receive the work end wise, a knife-holder pivotedat one side to a vertically adjustable normally stationary support andpivotally and adjustably se-x cured at its op ositeside to thespringpressed support or the lower feed roller, so

that said knife holder may be set initially at f different angles for agiven thickness *of work and automatically compensates for a variationin the thickness of the work, and

means-for adjusting the knife on its holder on said shaft, a verticallymovable yoke mounted under said feed roller, an idler journaled in saidyoke, said yoke having a shank portion which is slidably fitted in alateral bracket extension on said supporting frame, a spring interposedbetween said yoke and said lateral bracket extension, an adjustable stopon said shank adapted to bearagainst the under side of said lateralbracket extension, a vertically adjustable member on the supportingframe, a knife holder pivoted to said member at one side of said feedroller and idler, and a link ad justably and pivotally mounted on saidyoke and pivotally connected to said knife holder 15 at the oppositeside of said feed roller and idler.

Signed at St. Louis, Missouri, this 9th day of March, 1911.

BENJAMIN MEDALIE.

Witnesses:

G. A. PENNINGION, PAULINE AMBERG.

